The left lower abdomen vague pain can be seen in general surgery, obstetrics and gynecology, and urology, because in clinical practice the common diseases that appear in the left lower abdomen vague pain include: 1. digestive system diseases, mainly seen in colitis or colon tumors, polyps, usually need to be seen in general surgery. 2. urinary stones, mainly seen in the left side, usually need to be seen in urology, usually need to be done under the condition of holding urine Ultrasound of the urinary tract on the left side to clarify the diagnosis. If the stones are small, they can be removed by medication, while larger stones usually require lithotripsy or even surgery. 3. Female patients may also have pain in the left lower abdomen caused by ruptured corpus luteum, ectopic pregnancy, or torsion of ovarian cysts, which usually requires further ultrasound examination of the uterine adnexa for a clear diagnosis, so they usually need to be seen in the obstetrics and gynecology department.